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antiseptic1488 [7]
3 years ago
11

Part2 of the math homework

Mathematics
1 answer:
Molodets [167]3 years ago
5 0
Option four is the answer bc 8^2 is 64 and so is 4^3. so for the answer to be correct, it should say = and not ≠
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Show that every triangle formed by the coordinate axes and a tangent line to y = 1/x ( for x > 0)
vfiekz [6]

Answer:

Step-by-step explanation:

given a point (x_0,y_0) the equation of a line with slope m that passes through the  given point is

y-y_0 = m(x-x_0) or equivalently

y = mx+(y_0-mx_0).

Recall that a line of the form y=mx+b, the y intercept is b and the x intercept is \frac{-b}{m}.

So, in our case, the y intercept is (y_0-mx_0) and the x  intercept is \frac{mx_0-y_0}{m}.

In our case, we know that the line is tangent to the graph of 1/x. So consider a point over the graph (x_0,\frac{1}{x_0}). Which means that y_0=\frac{1}{x_0}

The slope of the tangent line is given by the derivative of the function evaluated at x_0. Using the properties of derivatives, we get

y' = \frac{-1}{x^2}. So evaluated at x_0 we get m = \frac{-1}{x_0^2}

Replacing the values in our previous findings we get that the y intercept is

(y_0-mx_0) = (\frac{1}{x_0}-(\frac{-1}{x_0^2}x_0)) = \frac{2}{x_0}

The x intercept is

\frac{mx_0-y_0}{m} = \frac{\frac{-1}{x_0^2}x_0-\frac{1}{x_0}}{\frac{-1}{x_0^2}} = 2x_0

The triangle in consideration has height \frac{2}{x_0} and base 2x_0. So the area is

\frac{1}{2}\frac{2}{x_0}\cdot 2x_0=2

So regardless of the point we take on the graph, the area of the triangle is always 2.

6 0
3 years ago
How do I find the Area of a Cylinder
Mandarinka [93]

Answer:

A=2πrh+2πr^2

Step-by-step explanation:

6 0
3 years ago
A jury pool has 18 people that are married and 22 people that are not married, from which 12 jurors will be selected. Assuming t
ivolga24 [154]
If the pool has 18 married and 22 not married, this means there are 40 people total
this means there’s a 18/40 probability that people who are married will be chosen
18/40 = 2/5
There is a 22/40 probability people who are un married will be chosen
22/40 = 11/20
3 0
3 years ago
Find the surface area of this prism. (ILL MARK YOU A BRAINLEST IF THE ANSWER IS RIGHT. PLS HELP)
Elden [556K]

Answer: the surface area is 216cm

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
How do you graph this equation -2/3y= -6
hichkok12 [17]

Answer:

First, you want to get y by itself, so you will multiply by the reciprocal

( 3 /−2 )-2/-3 : (3/-2)-6

y=9 should be your answer. since there is no x value or "slope" your line will be straight.

Step-by-step explanation:

I have attached what your graph would look like. I hope this helps!!

3 0
3 years ago
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